How to make an "old glass" material in cycles?
for this kind of things you will want to use either a normal map (using the normal map node under Add node>vector>normal map) or a bump map (using the bump node found under Add node>vector>bump) and feed the normal output into the normal input of your refraction or glass shader

Here is an example setup:



And the results this gives:



If you make a proper texture to acomodate for the distortion you are looking for then you should be able to get identical results to the images you provided.

If you decide to use normal maps then you will need to use this fix: www.youtube.com/watch?v=jlOtXtQSxd0